Subject: Re: [PATCH 1/3] slqb: Do not use DEFINE_PER_CPU for per-node data
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Mel Gorman <mel@csn.ul.ie>
Cc: Tejun Heo <tj@kernel.org>, Sachin Sant <sachinp@in.ibm.com>,
       Pekka Enberg <penberg@cs.helsinki.fi>, Nick Piggin <npiggin@suse.de>,
       Christoph Lameter <cl@linux-foundation.org>, heiko.carstens@de.ibm.com,
       linux-kernel@vger.kernel.org, linux-mm@kvack.org,
       Andrew Morton <akpm@linux-foundation.org>
In-Reply-To: <20090921135733.GP12726@csn.ul.ie>
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Date: Tue, 22 Sep 2009 09:54:21 +1000
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On Mon, 2009-09-21 at 14:57 +0100, Mel Gorman wrote:
> Sachin should be enjoying his holiday and I'm hogging his machine at
> the
> moment.  However, I can report that with this patch applied as well as
> the
> remote-free patch that the machine locks up after a random amount of
> time
> has passed and doesn't respond to sysrq. Setting
> CONFIG_RCU_CPU_STALL_DETECTOR=y didn't help throw up an error. Will
> enable a few other debug options related to stall detection and see
> does
> it pop out.

You can also throw it into xmon (provided you have it enabled) using the
"dump restart" command from the HMC. This does the equivalent of an NMI.

Cheers,
Ben.


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